CN101281128B - On-position type gas analysis system with on-position calibration function - Google Patents
On-position type gas analysis system with on-position calibration function Download PDFInfo
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- CN101281128B CN101281128B CN2007101473939A CN200710147393A CN101281128B CN 101281128 B CN101281128 B CN 101281128B CN 2007101473939 A CN2007101473939 A CN 2007101473939A CN 200710147393 A CN200710147393 A CN 200710147393A CN 101281128 B CN101281128 B CN 101281128B
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Abstract
The invention discloses an in situ gas analysis system with an in situ calibration function, which includes a light emitting device, a light receiving device, a signal analysis device, a mechanical connection structure and a measuring tube, wherein, the light emitting device and the light receiving device is combined with a measured gas pipeline through the mechanical connection structure, and also includes an attached tube, a control device and a gas replacement device; the measuring tube is a big C-shaped tube whose both ends are connected with the mechanical connection structure; the attached tube is a rotatable small C-shaped tube which is arranged in the big C-shaped tube, when the small C-shaped tube rotates, the gap of the big C-shaped tube is covered, so that a closed pipeline which is isolated from the measured gas is formed in the measured gas pipeline and on a measured optical path, the gas analysis system can be in calibration or measurement situation which can be caused by adjusting the relative position of the small C-shaped tube and the big C-shaped tube; the control device is used to cause the small C-shaped tube and the big C-shaped tube to form the closed pipeline which is isolated from the measured gas, the gas replacement device comprising a gas source, a valve and a ventilation joint communicates with the closed pipeline.
Description
Patent of the present invention is that application number is dividing an application of 2005100607797 Chinese patent, and the applying date of original application is on September 15th, 2005, and denomination of invention is " a kind of formula gas analysis system on the throne with calibrating function on the throne ".
Technical field
The present invention relates to formula gas analysis system on the throne, particularly a kind of formula gas analysis system on the throne with calibrating function on the throne.
Background technology
Formula gas analysis system on the throne is different with traditional sampling mode gas analysis system, it does not need sampling and preprocessing process, overcome a lot of defectives of traditional sampling mode gas analysis system, it is simple to have system, the reliability height, the measurement response speed is fast, the analysis precision height, advantage such as concentration that can measurement gas and speed is at modern industry, scientific research, fields such as environmental protection have obtained application more and more widely.Formula gas analysis system on the throne can adopt multiple absorption spectrum technology to realize, as Non-Dispersive Infra-red (NDIR) spectrum (NDIR) technology, and differential optical absorption spectrum (DOAS) technology, tunable semiconductor laser absorption spectrum (TDLAS) technology.
A kind of formula gas analysis system on the throne of widespread use, as shown in Figure 1, light emitting devices 1 and optical pickup apparatus 9 comprise that by mechanical connecting structure flange connects body 2, valve 3 connects on tested process gas pipeline 4.Also be provided with the light path adjustment structure on the mechanical connecting structure, the combination of elastic caoutchouc O shape circle and fastening bolt 10 is used to regulate light emitting devices 1 to the light path between the optical pickup apparatus 9.On mechanical connecting structure, be equipped with between big inner core 13, little inner core 14, two inner cores apart from being the measurement light path.When containing particles such as dust, drop at tested process gas, also dispose the purging system of forming by ventilating joint 41, gas passage and source purge gas 53.If when containing particles such as more dust, drop in the tested process gas, can also be in tested process gas pipeline measuring beam provided upstream one block body device, stop that particles such as dust, drop influence the transmittance that measuring beam improves measuring beam.
The aging meeting of light source and electronic devices and components etc. causes the slow drift of analytic system parameter, and therefore the accuracy that influence is measured need periodically demarcate formula gas analysis system on the throne.There is a few to have the gas analysis system on the throne of calibrating function on the throne at present.
U.S. Pat 5517314 discloses a kind of formula gas analysis system on the throne with calibrating function on the throne, comprises light emitting devices, demarcation and measuring channel, optical pickup apparatus and analytical equipment.Principle of work is as follows: the light that light source sends is reflected into two bundle directional lights through two concave mirrors: demarcate light beam and measuring beam, respectively through demarcating pipeline and measuring channel, reflect into optical receiver through two concave mirrors, send the analytical equipment analysis by optical fiber afterwards.On demarcating light path, outside the tested gas pipeline marked gas chamber is arranged, chamber also can be placed in the tested process gas pipeline and allow the demarcation light beam pass through, the tested gas of zero gas or concentration known charges into chamber by valve control, and purge gas feeds by ventilating joint and measures passage; When the needs timing signal, the computer control motor is seated in block body and measures on the light path, opens valve, charges into the tested gas of zero gas or concentration known at chamber, demarcates the light of light path and sends into analytical equipment by receiver.During measurement, the computer control motor is seated in block body and demarcates on the light path, and measuring beam is sent into analytical equipment by receiver.
This patented technology can realize demarcation on the throne, but the device complexity of this technology, such as: in the Optical Transmit Unit the inside, the light that light source sends becomes two bundle directional lights through the concave mirror back reflection, reflect into a receiver by concave mirror again, this exigent machining and assembly precision at this two bundles directional light of light receiving unit; Have again, demarcate and measure and in two pipelines, independently to carry out, can not effectively utilize measuring channel and demarcate, cause difficulty increase when installing and debug; Also have,, block body well to block measuring beam, enter optical receiver, reduce stated accuracy otherwise have measuring beam at timing signal.
Also have another to have the formula gas analysis system on the throne of calibrating function on the throne, it is on existing formula gas analysis system on the throne basis, is being provided with closed chamber near light emitting devices or optical pickup apparatus place.When the tested process gas pipelines of situation such as running into maintenance need be stopped the supple of gas or steam, the tested gas that charges into zero gas and concentration known in chamber respectively carried out zero setting and demarcation.This technology can not be used at any time, because situations such as pipeline maintenance seldom run into after all, can not just stop the supple of gas or steam at the needs timing signal, otherwise cost is too high; Have, even pipeline is stopped the supple of gas or steam, tested gas pipeline the inside also can residual tested process gas, can influence the precision of demarcation so again.
Summary of the invention
The invention provides a kind of gas analysis system on the throne with calibrating function on the throne, overcome existing formula gas analysis system device complexity on the throne, processing and installation accuracy with calibrating function on the throne require high, shortcoming such as the Installation and Debugging difficulty is low.
The technical solution used in the present invention is: a kind of formula gas analysis system on the throne with calibrating function on the throne, comprise light emitting devices, optical pickup apparatus, signal analysis device, mechanical connecting structure and measuring tube, light emitting devices and optical pickup apparatus connect on tested gas pipeline by mechanical connecting structure, and described analytic system also comprises tube-carrier, control device and gas displacement apparatus;
Described measuring tube is mounted in the C shape pipe in the tested process gas pipeline, and two ends are connected with described mechanical connection mechanism;
Described tube-carrier is mounted in rotating c-shape pipe in the described C shape pipe, after rotating, described c-shape pipe can cover the breach of C shape pipe, in tested gas pipeline and on the measurement light path, form and tested gas-insulated closed conduit, make gas analysis system be in demarcation or measurement state by the position of rotating the relative C shape pipe of c-shape pipe adjusting c-shape pipe;
Described control device is used to make c-shape pipe and C shape pipe to form and tested gas-insulated closed conduit, and the gas displacement device of being made up of concentration known gas source of the gas, valve and ventilating joint is communicated with the closed conduit that forms.
As preferably, described control device is mounted in the handle on the c-shape pipe, and described handle is positioned at the groove that radially slides of the outer mechanical connecting structure of tested gas pipeline.
As preferably, the two ends of described c-shape pipe are equipped with eyeglass near tested gas pipeline place, and the c-shape pipe after the rotation and the breach of C shape pipe are sealed and matched, and described ventilating joint is connected with C shape pipe between two eyeglasses.
As preferably, the chamber of a sealing is arranged in the junction that optical pickup apparatus and flange connect body, ventilating joint is arranged on the chamber, demarcate source of the gas and be connected with ventilating joint by valve.
Compare with existing formula gas analysis system on the throne with calibrating function on the throne, beneficial effect of the present invention is: (1) device is simple, utilizes measuring channel to carry out demarcation on the throne; (2) requirement of the assembly precision of device is low than prior art, and Installation and Debugging are easy; (3) the demarcation light path is longer, and calibration result is reliable; (4) can accomplish real-time demarcation on the throne.
Description of drawings
Fig. 1 is a kind of structural representation of existing formula gas analysis system on the throne;
Fig. 2 is the structural representation of a kind of formula gas analysis system on the throne of the present invention;
Fig. 3 is the diagrammatic cross-section of the control device of analytic system among Fig. 2;
Fig. 4 is the A-A figure of large and small C shape pipe when measuring among Fig. 2;
Fig. 5 is that large and small C shape pipe is schemed at the A-A of timing signal among Fig. 2.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is done further detailed description.
Embodiment:
As shown in Figure 2, a kind of formula gas analysis system on the throne with calibrating function on the throne is Non-Dispersive Infra-red (NDIR) spectrum (NDIR) gas analysis system, comprises light emitting devices 1, optical pickup apparatus 9, signal analysis device, mechanical connecting structure and measuring tube.Light emitting devices 1 and optical pickup apparatus 9 connect on tested process gas pipeline 4 by mechanical connecting structure (comprising that flange connects body 2, valve 3).Connecting body 2 middle O shapes circles by the 10 extruding flanges of the bolt on the adjusting mechanical connecting structure can regulate to the light path between the optical pickup apparatus 9 light emitting devices 1.Described analytic system also comprises tube-carrier and control device.
As shown in Figure 3, described measuring tube is that C shape pipe 21 is installed in the tested gas pipeline 4, and its two ends are connected with mechanical connecting structure.Described tube-carrier is mounted in described C shape pipe 21 inboard rotating c-shape pipes 22, as shown in Figure 4, can cover the breach of C shape pipe 21 after described c-shape pipe 22 rotates, as shown in Figure 5.
Described control device is mounted in the handle 25 of c-shape pipe 22 1 ends, and described handle 25 is positioned at the groove that radially slides of pipeline 4 outer mechanical connecting structure.
The gas displacement device is: described C shape pipe 21 is provided with ventilating joint 41, and concentration known gas source of the gas 40 (zero gas and gas) is connected with described ventilating joint 41 by valve 45, and described ventilating joint 41 is communicated with C shape pipe 21 between two eyeglasses 26.The two ends of c-shape pipe 22 are equipped with eyeglass 26 near tested gas pipeline 4 places, c-shape pipe 22 is provided with O shape circle 59 and Outer Tube sealing, preventing that tested process gas 7 from entering into the inner aperture of mechanical connecting structure, is the measurement light path of certain-length between two eyeglasses 26.
Being provided with gas compartment 8 near described optical pickup apparatus 9 places, ventilating joint 44,48 is arranged on the gas compartment 8, demarcate source of the gas 57 (comprising zero gas and gas) and be connected with ventilating joint 44 by valve 47.
The light beam that light emitting devices 1 sends enters into optical pickup apparatus 9, received signal feed signals analytical equipment after passing the inside of mechanical connecting structure, C shape pipe.Can regulate to the light path between the optical pickup apparatus 9 light emitting devices 1 by the bolt 10 extruding O shape circles of regulating on the mechanical connecting structure.
The course of work of above-mentioned gas analytic system is: at timing signal, turning handle 25 makes c-shape pipe 22 cover the breach of C shape pipe 21, as shown in Figure 5, forms a basic closed conduit around measuring beam in tested gas pipeline; By-pass valve control 45 charges into the zero gas bigger than pressure in the tested gas pipeline by ventilating joint 41 in basic closed conduit, be the tested gas displacement in the basic closed conduit zero gas; Simultaneously, described demarcation source of the gas 57 charges into zero gas by valve 47, ventilating joint 44 in described gas compartment 8, thereby to the analytic system operation of returning to zero.By-pass valve control 47 charges into gas in described gas compartment 8 then, and system is carried out proving operation.
After demarcation is finished, rotate described handle 25, thereby go back to described c-shape pipe 22, as shown in Figure 4.Valve-off 45 stops to lead to gas in C shape pipe 21; In described gas compartment 8, charge into simultaneously zero gas, thereby make analytic system revert to the measurement state.
Claims (4)
1. formula gas analysis system on the throne with calibrating function on the throne, comprise light emitting devices, optical pickup apparatus, signal analysis device, mechanical connecting structure and measuring tube, light emitting devices and optical pickup apparatus connect on tested gas pipeline by mechanical connecting structure; It is characterized in that: described analytic system also comprises tube-carrier, control device and gas displacement apparatus;
Described measuring tube is mounted in the C shape pipe in the tested process gas pipeline, and two ends are connected with described mechanical connection mechanism;
Described tube-carrier is mounted in rotating c-shape pipe in the described C shape pipe, after rotating, described c-shape pipe can cover the breach of C shape pipe, in tested gas pipeline and on the measurement light path, form and tested gas-insulated closed conduit, make gas analysis system be in demarcation or measurement state by the position of rotating the relative C shape pipe of c-shape pipe adjusting c-shape pipe;
Described control device is used to make c-shape pipe and C shape pipe to form and tested gas-insulated closed conduit, and the gas displacement device of being made up of concentration known gas source of the gas, first valve and first ventilating joint is communicated with the closed conduit that forms.
2. the formula gas analysis system on the throne with calibrating function on the throne according to claim 1, it is characterized in that: described control device is mounted in the handle on the described c-shape pipe, and described handle is positioned at the groove that radially slides of the outer mechanical connecting structure of tested gas pipeline.
3. the formula gas analysis system on the throne with calibrating function on the throne according to claim 1, it is characterized in that: the two ends of described c-shape pipe are equipped with eyeglass near tested gas pipeline place, the c-shape pipe after the rotation and the breach of C shape pipe are sealed and matched, and described first ventilating joint is connected with C shape pipe between two eyeglasses.
4. according to claim 1 or 2 or 3 described formula gas analysis systems on the throne with calibrating function on the throne, it is characterized in that: described mechanical connecting structure comprises that flange connects body, the chamber that a sealing is arranged in the junction that optical pickup apparatus and flange connect body, be provided with second ventilating joint on the chamber in addition, demarcate source of the gas and be connected with second ventilating joint on the chamber by second valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101473939A CN101281128B (en) | 2005-09-15 | 2005-09-15 | On-position type gas analysis system with on-position calibration function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101473939A CN101281128B (en) | 2005-09-15 | 2005-09-15 | On-position type gas analysis system with on-position calibration function |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100607797A Division CN100378450C (en) | 2005-09-15 | 2005-09-15 | In-position gas analyzing system with in-position calibrating function |
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| CN101281128A CN101281128A (en) | 2008-10-08 |
| CN101281128B true CN101281128B (en) | 2010-12-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102353634B (en) * | 2011-06-15 | 2013-05-01 | 西安毅达信息系统有限公司 | Online calibration method of laser online detection system for direction of gas contents in smoke |
| CN116223135B (en) * | 2023-05-05 | 2023-07-14 | 南京科力赛克安全设备有限公司 | Integrated sampling equipment convenient to operate and sampling method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2828802Y (en) * | 2005-09-15 | 2006-10-18 | 聚光科技（杭州）有限公司 | Positioning gas analysing system with positioning marking function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2828802Y (en) * | 2005-09-15 | 2006-10-18 | 聚光科技（杭州）有限公司 | Positioning gas analysing system with positioning marking function |
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